>Iron vestibule diaphragm
>Rubber vestibule diaphragm
>Pressure-tight vestibule diaphragm
>Puker vestibule diaphragm
>Exterior vestibule diaphragm

1.Clear width (normal): ≥800mm (not include areas with protective apron on the bottom)
2.Clear Height（normal）：≥1885mm
3.Passing curve ability: meeting the minimum radius curve requirement for vehicle passing
4.Sealability: Not affected by dirt, dust, water and snow.
5.Insulation performance: be good thermal insulation properties
6.Sound insulation performance: be good sound insulation performance
7.It should be with a flat space to facilitate the rapid passage of passengers, especially for wheelchairs and small food vehicles.
8.It should be easy to dry treatment of sewage and Condensate water, etc.
9.Would be easy to assemble and inspect, repair, and easy to replace
10.It will be easy to clean, the materials used should be resistant to abrasion and cracking, and should be resistant to cleaning agents (including external and internal), UV and lubricants.
11.Non-metallic materials with good fire resistance
12.Appearance, size and quality should meet the requirements of the product drawings.